/* names1.c -- 使用指向结构的指针 */
#include <stdio.h>
#include <string.h>

#define NLEN 30
struct namect {
    char fname[NLEN];
    char lname[NLEN];
    int letters;
};

void getinfo(struct namect *);
void makeinfo(struct namect *);
void showinfo(const struct namect *);
char *s_gets(char *st, int n);

int main(void) {
    struct namect person;

    getinfo(&person);
    makeinfo(&person);
    showinfo(&person);
    return 0;
}

void getinfo(struct namect *pst) {
    printf("Please enter your first name.\n");
    s_gets(pst->fname, NLEN);
    printf("Please enter your last name.\n");
    s_gets(pst->lname, NLEN);
}

void makeinfo(struct namect *pst) {
    pst->letters = strlen(pst->fname) + strlen(pst->lname);
}

void showinfo(const struct namect *pst) {
    printf("%s %s, your name contains %d letters.\n", pst->fname, pst->lname,
           pst->letters);
}

char *s_gets(char *st, int n) {
    char *ret_val;
    char *find;

    ret_val = fgets(st, n, stdin);
    if (ret_val) {
        find = strchr(st, '\n'); // 查找换行符
        if (find)                // 如果地址不是 NULL,
            *find = '\0';        // 在此处放置一个空字符
        else
            while (getchar() != '\n')
                continue; // 处理输入行的剩余字符
    }
    return ret_val;
}